initial

.gitignore

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+lib-cov
+*.seed
+*.log
+*.csv
+*.dat
+*.out
+*.pid
+*.gz
+.*
+*.sqlite
+pids
+logs
+results
+
+node_modules
+npm-debug.log

index.js

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+require('dotenv').config()
+const express = require('express')
+const simpleOauthModule = require('simple-oauth2')
+const randomstring = require('randomstring')
+const port = process.env.PORT || 3000
+
+const app = express()
+const oauth2 = simpleOauthModule.create({
+  client: {
+    id: process.env.OAUTH_CLIENT_ID,
+    secret: process.env.OAUTH_CLIENT_SECRET,
+  },
+  auth: {
+    tokenHost: 'https://github.com',
+    tokenPath: '/login/oauth/access_token',
+    authorizePath: '/login/oauth/authorize',
+  }
+})
+
+// Authorization uri definition
+const authorizationUri = oauth2.authorizationCode.authorizeURL({
+  redirect_uri: process.env.REDIRECT_URL,
+  scope: process.env.SCOPES || 'notifications',
+  state: randomstring.generate(32),
+})
+
+// Initial page redirecting to Github
+app.get('/auth', (req, res) => {
+  res.redirect(authorizationUri)
+})
+
+// Callback service parsing the authorization token and asking for the access token
+app.get('/callback', (req, res) => {
+  const code = req.query.code
+  const options = {
+    code
+  }
+
+  oauth2.authorizationCode.getToken(options, (error, result) => {
+    let mess, content
+
+    if (error) {
+      console.error('Access Token Error', error.message)
+      mess = 'error'
+      content = JSON.stringify(error)
+    } else {
+      const token = oauth2.accessToken.create(result)
+      mess = 'success'
+      content = {
+        token: token.token.access_token,
+        provider: 'github'
+      }
+    }
+
+    const script = `
+    <script>
+    (function() {
+      function recieveMessage(e) {
+        console.log("recieveMessage %o", e);
+        // send message to main window with da app
+        window.opener.postMessage(
+          'authorization:github:${mess}:${JSON.stringify(content)}',
+          e.origin
+        );
+      }
+      window.addEventListener("message", recieveMessage, false);
+      // Start handshare with parent
+      console.log("Sending message: %o", "github")
+      window.opener.postMessage("authorizing:github", "*");
+      })()
+    </script>`
+    return res.send(script)
+  })
+})
+
+app.get('/success', (req, res) => {
+  res.send('')
+})
+
+app.get('/', (req, res) => {
+  res.send('Hello<br><a href="/auth">Log in with Github</a>')
+})
+
+app.listen(port, () => {
+  console.log('gandalf is walkin\' on port ' + port)
+})

package.json

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+{
+  "name": "netlify-cms-github-oauth-provider",
+  "version": "1.0.0",
+  "description": "netlify oauth github client sending token in form as netlify service itself",
+  "repository": "https://github.com/vencax/netlify-cms-github-oauth-provider",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js"
+  },
+  "keywords": [
+    "netlify",
+    "cms",
+    "auth"
+  ],
+  "author": "Vaclav Klecanda <vencax77@gmail.com>",
+  "license": "MIT",
+  "dependencies": {
+    "dotenv": "^2.0.0",
+    "express": "^4.15.2",
+    "randomstring": "^1.1.5",
+    "simple-oauth2": "^1.2.0"
+  }
+}